File:Transactions (1871) (14761096024).jpg

Identifier: transmining14amer (find matches)
Title: Transactions
Year: 1871 (1870s)
Authors: American Institute of Mining, Metallurgical, and Petroleum Engineers
Subjects: Mineral industries
Publisher: New York (etc.)
Contributing Library: Robarts - University of Toronto
Digitizing Sponsor: University of Toronto

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Text Appearing Before Image:
:«H= II H 3-0, 3 rnc f— 3- — .K z N / //-2-6— m: ^ (6 Bolts, % inch, countersunk) \ pKT I *H<-2-< 1 : Fig. 4.Enlarged Longitudinal Sections Through HEARTH-PLATES THE PROCESS USED FOR REFINING COPPERY BULLION. 741 and proved of ample capacity, the amount of dust formed beingsmall.
Text Appearing After Image:
Red bricks were used, except for the parts directly exposed to theflame. The mortar for all inside work was a mixture of sand and 742 THE PROCESS USED FOR REFINING COPPERY BULLION. clay (materials, by the way, to be had for the hauling), lime beingused only for the masonry not affected directly by the fire. Thearch was built of one layer of brick set on end and covered with abed of sand. Air-holes (not shown in the sketch) were originallyprovided for admitting air through the fire-bridge and the arch tothe hearth, and also through the wall into the fireplace, but theyseemed to serve no useful purpose, and in time became obliterated.The chimney was 9r/x 15 in section and 24 feet high. The fireplace for the sulphurizing-kettle was built against thechimney, into which its draft was led. When the kettle was inoperation any escaping sulphur fumes were conducted into the chim-ney by means of an arrangement of hood and pipes of very lightsheet-iron, which could be raised or lowered at pleasu

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